单项选择题
A.80° B.82° C.84° D.86°
A.140.86 B.141.86 C.142.86 D.143.86
A.3mm B.2.5mm C.2mm D.1.5mm
A.库尔勒 B.塔里木 C.玉门 D.吐鲁番
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